EP0264032A2 - Méthode de régulation des grandeurs de dépendantes du débit - Google Patents

Méthode de régulation des grandeurs de dépendantes du débit Download PDF

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Publication number
EP0264032A2
EP0264032A2 EP87114357A EP87114357A EP0264032A2 EP 0264032 A2 EP0264032 A2 EP 0264032A2 EP 87114357 A EP87114357 A EP 87114357A EP 87114357 A EP87114357 A EP 87114357A EP 0264032 A2 EP0264032 A2 EP 0264032A2
Authority
EP
European Patent Office
Prior art keywords
control
time
solenoid valves
hydraulic fluid
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87114357A
Other languages
German (de)
English (en)
Other versions
EP0264032A3 (fr
Inventor
Johannes Dr. Rer. Nat. Hartfiel
Manfred Ing. Schmitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bopp & Reuther AG
Original Assignee
Bopp and Reuther GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bopp and Reuther GmbH filed Critical Bopp and Reuther GmbH
Publication of EP0264032A2 publication Critical patent/EP0264032A2/fr
Publication of EP0264032A3 publication Critical patent/EP0264032A3/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/26—Automatic controllers electric in which the output signal is a pulse-train
    • G05B11/30—Automatic controllers electric in which the output signal is a pulse-train using pulse-frequency modulation
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means

Definitions

  • the invention relates to a method for controlling flow-dependent control variables such as pressure, level or the like by means of a control valve controlling the flow, the throttle body of which is changed by a control cylinder connected to a hydraulic circuit by supplying or discharging hydraulic fluid in its stroke position, the adjustment of the Throttle body depending on the control deviation actual value minus setpoint of the controlled variable, on the time integral of this deviation and on the time differential of this deviation.
  • Control methods are known in which the proportional behavior, the integral behavior and the differential behavior are used not only individually but also in combination with one another in the implementation of the control deviation in stroke adjustments of the throttle body.
  • transmission coefficients for the proportional behavior, the integral behavior and the differential behavior are mechanically set or entered numerically in order to convert the control deviation into control signals.
  • the restriction to these three transmission coefficients is a limitation that does not result in optimal control behavior for all controlled systems.
  • the object of the invention is to find a control method that can be adapted to any controlled system.
  • solenoid valves are provided as quickly responding solenoid valves according to the feature of claim 3, then the respectively free one Flow cross-section automatically controlled by the duration of the opening pulses. With short opening pulses only the pilot cone with a small cross-section opens, while with long opening pulses the large main cone cross-section is released. If you want to shorten the operating times for the stroke of the throttle body of the control valve even further, it is advisable, according to the features of claim 4, to arrange several quickly responding solenoid valves with the same or different opening cross section in parallel connection. In the case of large quantities of hydraulic fluid to be discharged or supplied, the solenoid valve or solenoids connected in parallel can then be switched on, so that the flow cross section is doubled or even multiplied when several solenoid valves are connected in parallel.
  • the load is proposed in accordance with claim 7 Measure the pressure in the actuating cylinder in time and also take this into account when correcting the opening pulses for the drain solenoid valves.
  • the loading pressure in the actuating cylinder and also the pressure in the accumulator of the hydraulic control circuit change.
  • the amount of hydraulic fluid flowing through the inflow solenoid valves per unit of time depends not only on the flow cross section but also on the difference between the storage pressure and the loading pressure. Accordingly, according to the feature of claim 8, the pressure difference between the pressure in the memory of the hydraulic control circuit and the loading pressure in the actuating cylinder is measured in time and taken into account in the calculation of the opening pulses of the inflow solenoid valve or valves as a correction variable.
  • the heating of the hydraulic fluid can be done in a simple manner according to the feature of claim 12 in that when the temperature falls below the lower limit, the hydraulic pump of the hydraulic control circuit is switched on or remains until the hydraulic fluid is sufficiently heated by the power loss of the hydraulic system converted into thermal energy Has.
  • the electronic device provided for the control of the control valve also makes it possible to increase the functional reliability of the control valve by monitoring the most important components and promptly reporting faults.
  • a control valve 2 is installed in the pipeline 1 through which the medium flows.
  • the throttle body of this control valve 2 is connected to the piston 4 of a hydraulic control cylinder 5 via a valve rod 3.
  • the load chamber 6 of the actuating cylinder 5 is connected via a hydraulic line 7 to a hydraulic control circuit, the basic structure of which consists of a hydraulic pump 8 with a motor 9, an oil reservoir 10 and two accumulators 11 and 12 connected in parallel.
  • a check valve 13 and a pressure relief valve 14 are also provided in the hydraulic control circuit.
  • the hydraulic fluid is discharged from the load chamber 6 of the actuating cylinder 5 via the drain solenoid valve 15, which is connected on the inlet side via the branch line 16 to the hydraulic line 7 and on the outlet side to the drain line 17 leading to the oil reservoir 10.
  • the drain Solenoid valve 15 is controlled by an electronic assembly 18, which transmits opening pulses to the electrical switching part 20 or the solenoid of the drain solenoid valve 15 via a control line 19.
  • the electronics module 18 is connected on the input side via the measuring line 21 to the electrical signal output 22 of a measuring sensor 23 connected to the pipeline 1.
  • the throttle body is controlled in the opposite direction via the inflow solenoid valve 24, which is connected on the input side to the pressure line 25 of the hydraulic control circuit and on the output side to the hydraulic line 7 leading to the load chamber 6.
  • the electrical switching part 26 or the solenoid of the inflow solenoid valve 24 is switched via the control line 27 from the electronics unit 18.
  • the electronic assembly 18 all the electronic assemblies required for the control of the control valve 2, such as computers, memories, amplifiers and the other electronic modules, are combined.
  • the desired characteristic curves dependent on the control deviation, the time integral of the control deviation, and the characteristic curves dependent on the time differential of the control deviation are entered into the electronic memory of the electronic unit 18 before the controlled system is started up.
  • a fixed setpoint for the controlled variable is entered in the electronic memory, or a variable reference variable is transmitted via the electrical feed line 28.
  • the computer determines the size of the stroke step of the throttle body of the control valve 2 to be carried out for each cycle on the basis of the stored characteristic curves.
  • the one to be removed from the load chamber 6 or that of the load chamber 6 is to be carried out in the electronic assembly 18
  • the piston 4 of the control valve 5 and thus the throttle body of the control valve 2 is gradually shifted in one or the other direction.
  • a pressure sensor 29 is also connected to the hydraulic line 7, the electrical output 30 of which is connected to the electronic assembly 18 via the measuring line 31.
  • Another pressure and temperature sensor 32 is connected to the pressure line 25 of the hydraulic control circuit, the electrical output 33 of which is connected to the electronic assembly 18 via the measuring line 34. Via this pressure and temperature sensor 32, the differential pressure which is present at the inflow solenoid valve 24 and the temperature of the hydraulic oil can be taken into account as a correction variable when calculating the opening pulses.
  • a lifting sensor 35 is also provided on the actuating cylinder 5, the electrical output of which is via the measuring line 36 to the Electronics unit 18 is connected.
  • the installation connections 37 and 38 in the parallel lines 39 and 40 have been provided so that an additional drain solenoid valve or an additional inflow solenoid valve can be installed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Position Or Direction (AREA)
EP87114357A 1986-10-04 1987-10-01 Méthode de régulation des grandeurs de dépendantes du débit Withdrawn EP0264032A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863633852 DE3633852A1 (de) 1986-10-04 1986-10-04 Verfahren zum regeln von durchflussabhaengigen regelgroessen
DE3633852 1986-10-04

Publications (2)

Publication Number Publication Date
EP0264032A2 true EP0264032A2 (fr) 1988-04-20
EP0264032A3 EP0264032A3 (fr) 1989-05-31

Family

ID=6311061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114357A Withdrawn EP0264032A3 (fr) 1986-10-04 1987-10-01 Méthode de régulation des grandeurs de dépendantes du débit

Country Status (2)

Country Link
EP (1) EP0264032A3 (fr)
DE (1) DE3633852A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660017A1 (fr) * 1993-12-22 1995-06-28 NUOVO PIGNONE S.p.A. Système de diagnostic et de régulation pour un actionneur pneumatique d'une valve
EP0566576B1 (fr) * 1990-11-09 1996-06-05 KUSTERER, Helmut Procede et dispositif de regulation d'un flux massique
EP3647899A1 (fr) * 2018-10-29 2020-05-06 Siemens Schweiz AG Procédé de fonctionnement d'une soupape, unité de commande électronique associée et entraînement de soupape
CN114460978A (zh) * 2022-01-14 2022-05-10 卓外（上海）医疗电子科技有限公司 大范围高精度流体调节装置及方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396847B (de) * 1991-11-19 1993-12-27 Zauner Werner Elektronisch gesteuerte durchflusssperreinrichtung für flüssigkeitsleitungen, insbesondere wasserrohre od. dgl.
DE19536391A1 (de) * 1995-09-29 1997-04-03 Siemens Ag Vorrichtung zur Regelung des Pegels einer in einem Vorratsbehälter aufgenommenen Flüssigkeit
US20050150552A1 (en) * 2004-01-06 2005-07-14 Randy Forshey Device, method, and system for controlling fluid flow

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2756916C2 (de) * 1977-12-21 1985-09-26 Danfoss A/S, Nordborg Vorrichtung zur Einrichtung der Fördermenge einer Wasserwerk-Pumpenanordnung
GB2129170B (en) * 1982-10-21 1986-09-24 Secr Defence Improvements in or relating to pressure controllers
JPS5998217A (ja) * 1982-11-26 1984-06-06 Fujikin:Kk 流量制御装置
JPS6011622A (ja) * 1983-06-30 1985-01-21 Honda Motor Co Ltd 電磁弁手段のデユ−テイ比制御方法
US4556956A (en) * 1983-09-16 1985-12-03 General Electric Company Adjustable gain controller for valve position control loop and method for reducing jitter
DD219605A1 (de) * 1983-11-24 1985-03-06 Tech Hochschule Anordnung zur erzeugung eines nichtlinearen reglerverhaltens

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566576B1 (fr) * 1990-11-09 1996-06-05 KUSTERER, Helmut Procede et dispositif de regulation d'un flux massique
EP0660017A1 (fr) * 1993-12-22 1995-06-28 NUOVO PIGNONE S.p.A. Système de diagnostic et de régulation pour un actionneur pneumatique d'une valve
US5538036A (en) * 1993-12-22 1996-07-23 Nuovo Pignone S.P.A. Control system for a pneumatic valve actuator
EP3647899A1 (fr) * 2018-10-29 2020-05-06 Siemens Schweiz AG Procédé de fonctionnement d'une soupape, unité de commande électronique associée et entraînement de soupape
WO2020088831A1 (fr) 2018-10-29 2020-05-07 Siemens Schweiz Ag Procédé pour faire fonctionner une vanne, unité de pilotage électronique associée et mécanisme d'entraînement de vanne
CN112912812A (zh) * 2018-10-29 2021-06-04 西门子瑞士有限公司 用于运行阀的方法、相关的电子操控单元和阀驱动装置
US11828384B2 (en) 2018-10-29 2023-11-28 Siemens Schweiz Ag Method for operating a valve, associated electronic control unit, and valve drive
CN114460978A (zh) * 2022-01-14 2022-05-10 卓外（上海）医疗电子科技有限公司 大范围高精度流体调节装置及方法

Also Published As

Publication number Publication date
EP0264032A3 (fr) 1989-05-31
DE3633852A1 (de) 1988-04-07
DE3633852C2 (fr) 1992-09-10

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Inventor name: HARTFIEL, JOHANNES, DR. RER. NAT.